This is the first summer in years that I haven't really acclimated well to our convection-oven summers, even though I've lived in the Merciless Desert my entire life. My mileage this summer has been wretched, even though this summer hasn't been all that bad (with some days even in the 'chilly' 90s). I typically start rides at dawn and go until late morning, so I miss the worst of the the broiling. And although it is very true the (relatively) lower humidity here makes it more bearable, it's still frugging hot. And the most demoralizing part is not a 118° high, it's a 90° low, where It Just Starts Going Back Up Again From There as soon as the sun reappears.
I remember commuting uphill in 117° heat and it not bothering me much, although the best days were the ones that stopped by the public pool for my son's swim lessons. Now at a mere 105° I'm on the edge of heat exhaustion, even with a spray bottle and lots of hydration.
The fall riding season is looming soon, so I may need to start some 4 am lit rides a few times a week to start rebuilding my base.
Looking forward to mid-September, when the evenings will start cooling off again. Only 6 or 7 searing weeks to go...